Paper container



Oct. 15, 1929. w. L. WRIGHT ET AL PAPER CONTAINER Filed Feb. 15. 1927Patented Oct. 15, 1922 UNITED STATES PATENT OFFICE WLLBUR L. WRIGHT, OFFULTON, AND JOSEPH T. BOND, OF PHOENIX, NEW YORK,

ASSIGENOBS TO OSWEGO FALLS CORPORATION, OF FULTON, NEW

-PORATION F NEW YORK Yonx, A conf PAPER CONTAINER .Application me;February 15, 1927. serial No. 168,333.

The purpose of this invention is to successfully solve the difficultproblem of providing a. tapered or nesting paper container thatembodiesa removable slip cover, that will com. '5 ply with the requirements ofthe public and trade, that will be capable of manufacture by quantityproduction methods, and that can be placed on the market at a reasonableprice. With the foregoing and other objects in 1o view, the inventionconsists in certain novel structural features, and/or in formations andcombinations as m'ore fully and particularlv set forth and specifiedhereinafter.

Referring to the accompanying drawings, forming a part hereof Fig. 1shows the upper or large diameter end portion of a' nesting or taperedpaper container of our invention, in sectional elevation.

Fig. 2 shows the tapered paper container of Fig. 1 in sectionalelevation, the cover not be ing shown.

Fig. 3 shows in longitudinal section, part of a hollow mandrel and partof a tapered paper body or barrel-located in such mandrel with its largeextended end projected upwardly therefrom, preparatory to shaping suchend to form the peculiar novel container body rim.

Fig. 4 shows in longitudinal section, the

forming head, and the rim of the paper container body as formed by thecooperation of the mandrel and head.

In the drawings, we show a paper container that embodies a tapered ornesting sheet paper body or barrel l; a suitable bottom that includesbottom closing disk 2, indicated by dotted lines, Fig. 2; and aremovable slip friction cap or cover 3, formed of sheet paper material.

The barrel 1, is tapered to its large mouth, and is preferably composedof a sheet of suitable paper board or like sheet fibrous materialusually formed by folding a flat sheet paper blank around a mandrel sothat its ends overlap and can be cemented or otherwise secured togethervto form a liquid tight joint that extends longitudinally throughout thelength of the hollow body or barrel thus formed. This barrel tapers orincreases in structures of Fig. 3, and the upsettingor diameter from itslower to its large mouth or open end to produce a truncated cone shape.These containers having tapered bodies when wlthout their covers, canvbe nested one within the other into stacks, for packing and shippmgpurposes, where economy in bulk or space desirable, the covers for thecontainers being suitably assembled for packaging with the containerbodies, if desirable. The lower or small diameter end of the body isclosed to, preferably, form a liquid tight joint and an annulardepending base or rim 2a, by a suitable bottom closure that preferablyembodies a heavy flat inset paper board bottom disk 2, of overlargediameter, and suitable body formation and crimping, upsetting orrolling'tightly and permanently securing said bottom disk and formingsaid annular base 2a. However, our present invention is not concernedwith the particular bottom formation.

The sheet material barrel 1, is originally formed of substantial overlength both at its small (lower) end and at its large (upper) end l, toprovide an extra body length to be taken up by the bottoming form theannular projecting base 2a, and an extra top body length to be taken upby the peculiar top exterior cover-receiving rim formation.

The upper large end of the body is formed with an annular exterior moreor less elastic rim-forming hollow roll or crimp that is radiallyiiattened or narrow and that is longitudinally or vertically elongatedand that forms and constitutes the transversely or radially roundedannular top edge or lip 4,

'of the container surrounding its mouth, and

that provides the exterior vertical approximately cylindrical wall 4b,in downward exterior continuation of the lip 1l, and which wall iscushioned or more or less elastic or yielding for frictional-holdingsliding contact with the cover flange.

The exterior depending substantially ver- U tical and cylindrical wall4", terminates in the bottom inwardly radially or transversely roundedor curved lower end portion 4a, of the rim forming roll, and thisinturned portion tterminatesinthe free in, or if so desired up, turnedfree edge 4, that abuts the tapered outer surface of the barrel 1, withthe raw edge extremity preferably covered and con` cealed. 'lhe bottomedge. 4, of the roll bears against but is preferably not secured orfastened to the tapered outer surface of the barrcl l. and hence is freeto yield and slightly move with respect to the barrel during theolwrations of' applying and removing the cover, v

The vertically elongated vertical 1-i1nfo11n ing roll, in connectionwith the outer surface of the barrell, within the roll, encloses orforms an annular air cushion, pocket or chamber 4d, which aids inexpanding the more or less elastic roll in maintaining its friction gripon or engagement with the cover fiange.

This` rim-forming roll formation is at the exterior of the barrel andpermits the Haring inner surface of the barrel to continue unbroken andat a uniform angle from the bottom formation to the rounded top edge orlip 4, of the barrel, which is a desirable characteristic.

The paper material cover 3, is of any desirable or suitable formation ofthe slip cover type with a container mouth-covering top wall and anannular substantially vertical cylindrical depending flange 3, that isvertically or longitudinally elongated with respect to the verticallength of the rim-forming roll of the container body, which flange isstiff and with a cylindrical inner surface without projections, i. e.smooth-surfaced. This cover 3, is preferably so formed that when theslip cover is in normal closing position on the body to constitutetherewith the complete container` the usually flat top wall of the covercloses down on and abuts the annular top edge or lip 4, of the body, andthe cover flange 3a depends to a distance below the rim-forming exteriorroll lof the body, and at its inner surface has more or less tightfrictional holding engagement with the elongated vertical cylindricalouter wall 4b, of said rim. The internal diameter of the longcylindrical cover flange 3a, more or less closely approximates thenormal external diameter of the elastic elongated cylindrical rim wall4", and the cover can be slipped to and from container body coveringposition by exercise of the necessary power to overcome the frictionbetween the engaging cover and rim surfaces even though said friction isaugmented by the elasticity of said friction wall which compensates forslight variations in the internal diameter of the cover flange anddistortions thereof from accurate cylindrical form. Furthermore, thevertically elongated form of the outer wall 4b, of the rim, aided ifneed be by its elasticity and trapped air backing, affords ample area ofgripping frictional contacting surfaces between said wall and the longcover fiange to maintain the cover in closing posltion on the body tomeet trade and users requirements.

The wide exterior annular top lip 4, that is radially rounded and curvesupwardly, outwardly and downwardly to merge into the vertical outer wall4b, materially aids in the initial movement of starting the cover ontothe container which is usually accomplished by a tilting movement of thecover onto the body top.

The tapered container body is originally formed with the overlong largetapered end 1, for formation into the exterior rim-forming roll,preferably by means of a hollow mandrel 5, and a roll forming die orcrimping head 6. The paper body, or at least said overlong end l,thereof is first preferably more or less heavily parafiined or otherwiseprovided with a lubricating waterproofing material, to affordlubrication between the contacting rubbing surfaces of the paper and dieduring the upsetting and rolling operation to prevent fracture andbreaking of the paper and to permit reshaping and expanding of the paperto a new permanent form without opening fissures and separations in thepaper. The body 1, is then inserted in the hollow mandrel 5, say asindicated by Fig. 3. The die 6, having in its bottom face peculiarlyformed and proportioned crimping or upsetting groove 6, then descends onthe overlong paper body end l, and in cooperation with the end die face5, of the mandrel, reduces the overlong body end, to the desiredpermanent rim-forging roll form substantially as shown by Fig. 4.

As at present advised by experience, we do not wish to limit allfeatures of our invention to such method or such apparatus for theformation of our new nesting container body rim formation.

lVhat we claim is i 1. A nesting paper container comprising a stiffstable longitudinally tapered body at its large upper end or mouthformed with an exterior rim-forming hollow roll longitudinally elongatedand radially flattened and inturned at its annular lower end to contactthe exterior surface of the tapered body, said roll providing anexterior longitudinally elongated annular wall for frictional slidingholding contact with the depending cylindrical fiange of a slip cover,said body having a top annular transversely curved top lip surroundingthe mouth of the body and continuing from the tapered inner longitudinalsurface to said exterior wall of said riln.

2. A container comprising a sheet paper body longitudinally tapered fornesting, from its bottomed small end to its upper large mouth end. saidbody formed with an annular exterior rim-forming roll surrounding itsmouth and providing said body with a transversely rounded top lipsurrounding said mouth and an annular approximately cylindricalvertically elongated flexible wall decover for said mouth with ingapproximately cylindrical strong stili pending from said lip and ofenlarged diameter with respect to and, spaced outwardly from the taperedupper end of the body and at the bottom terminating in an annularinturned edge portion for contacting the tapered body to provide anannular cushioning air pocket backing said wall.

A container ing stable paper material body tapered for nesting, thelarge mouth end of said body formed with an exterior annular dependingrim forming roll that provides an exterior dependingvertically-elongated cover-flange gripping and contacting wall havingits lower end annularly contracted to contact the body wall, incombination with a slip cover for said mouth end of the body having adepending annular flange the minimum internal diameter of which isapproximately equal to the external diameter of said wall.

4. A paper container comprising a bottomed body, in combination with anannularly flanged friction slip cover for the mouth end of said body,said body longitudinally tapered to its large mouth end and there formedwith an exterior annular depending rim providing an internal annulartrapped air pocket surrounding the tapered wall of the body and havingan exterior approximately cylindrical elastic wall tting within thecover ange with a sliding friction gripping cover holding contact, thelower end of said wall'turned in and contacting said body.

5. A container comprising a tapered bottomed body longitudinally taperedinternally to the rounded top lip surrounding its large mouth, incombination with a removable sli an annular dependl ange exteriorlysurrounding said mouth end of the body, said mouth end of the bodyhaving an exterior approximately cylindrical elastic wall depending fromsaid top lip and of greater diameter than the maximum external diameterof and surrounding the tapered mouth end of the body and of shortervertical length than said cover iiange and formed to fit therein with afriction gripping cover holding sliding contact, the annular lower endof said wall contacting the exterior surface of the tapered body.

6. A container having a sheet paper material body longitudinally taperedfor nesting, the large tapered end portion of the body rounded upwardlyand outwardly and turned downwardly and inwardly to form a permanentexterior annular depending approximately cylindrical elastic wall to litwithin the annular depending approximately cylindrical flange of aremovable slip cover for the large end of the body with a frictiongripping cover holding sliding contact, the lower end of said wallcontacting said tapered body to trap air between the wall and body.

comprising a self-support- Signed at Fulton, county of Oswego, State ofNew York, this 11th day of February, 1927.

WILBUR L. WRIGHT. JOSEPH T. BOND.

